Jamie Laing ultramarathon LIVE : Radio 1 star begins gruelling London to Salford run for Comic Relief TODAY

RADIO 1 presenter Jamie Laing has started his gruelling 150 mile-run from London to Salford to raise money for Comic Relief.

From his start line in London at 8.20am this morning, Jamie’s run of a lifetime is taking him North towards the finish in Salford on Friday when Red Nose Day officially kicks off.

Today he will be running to Harpenden – a distance of 30.2 miles.

You can donate to Jamie's run here and follow our live blog, below, for all the latest updates ...